be able to 6

[John]

Let me confirm this, please!

1-1. I can help you repair the roof tomorrow.
1-2. I'm able to help you repair the roof tomorrow.
1-3. I'll be able to help you repair the roof tomorrow.

2-1. I can visit you this weekend.
2-2. I'm able to visit you this weekend.
2-3. I will be able to visit you this weekend.

3-1. I can do it next year.
3-2. I'm able to do it next year.
3-3. I will be able to do it next year.

Q1. These are all correct, aren't they?
Q2. We can say [-1]s and [-2]s with the same meaning, can't we?

Thank you very much.

[Pete]

Let me confirm this, please!

1-1. I can help you repair the roof tomorrow.
1-2. I'm able to help you repair the roof tomorrow.
1-3. I'll be able to help you repair the roof tomorrow.

2-1. I can visit you this weekend.
2-2. I'm able to visit you this weekend.
2-3. I will be able to visit you this weekend.

3-1. I can do it next year.
3-2. I'm able to do it next year.
3-3. I will be able to do it next year.

Q1. These are all correct, aren't they?
Q2. We can say [-1]s and [-2]s with the same meaning, can't we?

Thank you very much.
A1. Yes, but see my comment below.
A2. Yes, but see my comment below.

To me, the farther into the future you are talking about, the less likely you will be to use the "-2" option, "I'm able to ..."

In particular, 2-2 is a bit less likely than 1-2, and I really think one would almost always pick either 3-1 or 3-3 over 3-2.